Originally Posted by
DaveSSS
Selection of tire width can be affected by rider weight. At 135 pounds, I'm using 28 front and 30 rear, both at 55 psi or a bit less, based on the Zipp pressure calculator. I have 3 bikes with 25mm internal width hookless rims from BTLOS that require no rim tape. I'm sold on Pirelli P-Zero TLR tubeless, due to their small amount of bead stretch over time. If a tire unseats when the air is let out to check sealant level, it's probably due to bead stretch.
Note that rims have internal and external width, not diameter. It's IW, not ID.
(Though, of course, being round they DO have diameter. But that's not what we're talking about)
/pedant
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